Seedream 5.5
ByteDance Seed’s November 9, 2026 image-generation and editing model. The API fields below describe WaveSpeed’s hosted offer, checked November 10; they are not a BytePlus-wide contract.
- Seedream 5.5 editing and transparency guide
Watch official demonstrations and understand the 100-round claim and access boundaries.
- Image generation models
Browse other image-generation and editing options.
- AI Model API
Check model IDs, platform contracts and billing scopes.
Visual examples
ByteDance Seed’s recorded sequence of 100 successive image edits to a seated person, clothing, accessories and tabletop objects. Each result becomes the next input. · 39.541667 seconds
ByteDance Seed’s 100-edit demonstration: successive changes to one image. Publisher-selected example, not an independent test or a guarantee for every image.
ByteDance Seed’s recorded snowy-owl demonstration of transparent image assets and fine feather boundaries. The video illustrates an image workflow, not native video generation. · 41.041667 seconds
Official RGBA asset demonstration. The recording illustrates transparent-asset workflows; inspect the exported alpha channel and edges in your own result.
🚀Function Overview
Generate images or edit up to 10 references on WaveSpeed, with PNG transparency and 1K, 1.5K or 2K output tiers.
Key Features
- WaveSpeed generation ID: bytedance/seedream-v5.5; edit ID: bytedance/seedream-v5.5/edit.
- WaveSpeed output: 1k (default), 1.5k or 2k; png (default) or jpeg.
- WaveSpeed editing accepts 1–10 image URLs or Base64 strings.
- For transparent output, set background to transparent and output_format to png; JPEG cannot preserve alpha.
- ByteDance’s 100-round recording is a publisher demonstration, not an independent guarantee for arbitrary inputs.
- API examples are documentation-based and unexecuted. Review the final output and current provider terms.
Use Cases
- •Repeated revisions to product or character visuals
- •Transparent subjects and design elements for compositing
- •Text-to-image concepts with manual text and detail checks
⚙️Input Parameters
prompt
stringRequired text description for generation or editing. State the change and the details to preserve.
images
arrayRequired only for the /edit endpoint: 1–10 reference image URLs or Base64 strings. Omit for text-to-image generation.
resolution
stringWaveSpeed: 1k (default), 1.5k or 2k. These tiers do not establish a universal model resolution limit.
background
stringauto (default), transparent or opaque. transparent requires png output.
output_format
stringpng (default) or jpeg. Use png for an alpha channel.
aspect_ratio
stringOptional supported ratio, including 1:1, 3:4, 4:3, 9:16 and 16:9. Editing preserves the first input image ratio when omitted; consult the host schema for all options.
💡Usage Examples
Example 1
Input Parameters
{
"method": "POST",
"url": "https://api.wavespeed.ai/api/v3/bytedance/seedream-v5.5",
"body": {
"prompt": "Create a blue knitted owl sticker with fine feather-like fibers and a transparent background. No lettering.",
"resolution": "1k",
"background": "transparent",
"output_format": "png"
}
}Output Results
Example 2
Input Parameters
{
"method": "POST",
"url": "https://api.wavespeed.ai/api/v3/bytedance/seedream-v5.5/edit",
"body": {
"prompt": "Change only the mug to matte blue. Preserve the person, face, table, lighting and background.",
"images": [
"https://example.com/your-owned-reference.png"
],
"resolution": "1k",
"output_format": "png",
"background": "auto"
}
}Output Results
Quick Actions
Technical Specifications
- Hardware Type
- Hosted REST API (WaveSpeed)
- Commercial Use
- Commercial-use and upload rights depend on the selected provider’s applicable terms. This record does not establish an unconditional commercial-use or downloadable-weight license.
- Pricing
- WaveSpeed, checked November 10, 2026: output $0.02 at 1K/1.5K or $0.035 at 2K. Editing adds $0.008 per input image: one-reference edits $0.028 or $0.043. Final task charge prevails. BytePlus’s from-$0.02 first-purchase package is a separate introductory offer.